html,body {
		height: 100%;
	}
	.box {
		filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#6699FF', endColorstr='#6699FF'); /*  IE */
	background-image:linear-gradient(bottom, #6699FF 0%, #6699FF 100%);
	background-image:-o-linear-gradient(bottom, #6699FF 0%, #6699FF 100%);
	background-image:-moz-linear-gradient(bottom, #6699FF 0%, #6699FF 100%);
	background-image:-webkit-linear-gradient(bottom, #6699FF 0%, #6699FF 100%);
	background-image:-ms-linear-gradient(bottom, #6699FF 0%, #6699FF 100%);
	
	margin: 0 auto;
	position: relative;
	width: 100%;
	height: 100%;
}
.login-box {
	width: 100%;
	max-width:500px;
	height: 400px;
	position: absolute;
	top: 50%;

	margin-top: -200px;
	/*设置负值，为要定位子盒子的一半高度*/
	
}
@media screen and (min-width:500px){
	.login-box {
		left: 50%;
		/*设置负值，为要定位子盒子的一半宽度*/
		margin-left: -250px;
	}
}	

.form {
	width: 100%;
	max-width:500px;
	height: 275px;
	margin: 25px auto 0px auto;
	padding-top: 25px;
}	
.login-content {
	height: 300px;
	width: 100%;
	max-width:500px;
	background-color: rgba(255, 250, 2550, .6);
	float: left;
}		
	
	
.input-group {
	margin: 0px 0px 30px 0px !important;
}
.form-control,
.input-group {
	height: 40px;
}

.form-group {
	margin-bottom: 0px !important;
}
.login-title {
	padding: 20px 10px;
	background-color: rgba(0, 0, 0, .6);
}
.login-title h1 {
	margin-top: 10px !important;
}
.login-title small {
	color: #fff;
}

.link p {
	line-height: 20px;
	margin-top: 30px;
}
.btn-sm {
	padding: 8px 24px !important;
	font-size: 16px !important;
}